The Current Density on Electrosynthesis of Hydroxyapatite with Bipolar Membrane Adrian Nur, Arif Jumari, Anatta W Budiman, Nazriati Nazriati, Fauziatul Fajaroh, Jeihan H Fariza and Tovaliery L Anisa MATEC Web Conf., 156 (2018) 05015 Published online: 14 March 2018 DOI: 10.1051/matecconf/201815605015